linux-kernel - Re: Candidate Linux ABI for Intel AMX and hypothetical new related features

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Date:   Wed, 23 Jun 2021 19:11:52 -0400
From:   Len Brown <lenb@...nel.org>
To:     Florian Weimer <fweimer@...hat.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Dave Hansen via Libc-alpha <libc-alpha@...rceware.org>,
        Dave Hansen <dave.hansen@...el.com>,
        Rich Felker <dalias@...c.org>,
        Linux API <linux-api@...r.kernel.org>,
        "Bae, Chang Seok" <chang.seok.bae@...el.com>,
        X86 ML <x86@...nel.org>, LKML <linux-kernel@...r.kernel.org>,
        Kyle Huey <me@...ehuey.com>, Borislav Petkov <bp@...en8.de>,
        Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Keno Fischer <keno@...iacomputing.com>,
        Arjan van de Ven <arjan@...ux.intel.com>,
        Willy Tarreau <w@....eu>
Subject: Re: Candidate Linux ABI for Intel AMX and hypothetical new related features

On Wed, Jun 23, 2021 at 11:07 AM Florian Weimer <fweimer@...hat.com> wrote:
>
> * Peter Zijlstra:
>
> > On Fri, May 21, 2021 at 04:44:58PM +0200, Florian Weimer wrote:
> >
> >> And we added an interface for querying x86 CPU features to glibc 2.33
> >> which is completely incompatible with this because it assumes that CPU
> >> features do not change during the lifetime of a process. 8-(
> >
> > How many x86 kernel maintainers signed off on that patch?
>
> I've started a new thread:
>
>   x86 CPU features detection for applications (and AMX)
>   <https://lore.kernel.org/linux-api/87tulo39ms.fsf@oldenburg.str.redhat.com/>

FWIW, I didn't receive it, because you excluded

linux-kernel@...r.kernel.org

(x86@...nel.org is just the actual x86 kernel committers, ISTR)

Len Brown, Intel Open Source Technology Center